Publication: Síntesis de nanopartículas NiFe2₂O₄. Ensayos de recubrimiento y funcionalización con vistas a su empleo como materiales funcionales
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2021-06-18
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Universidad Complutense de Madrid
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Abstract
En las últimas décadas se ha producido un incremento significativo del número de estudios basados en nanomateriales. Entre los temas más estudiados se encuentran los que versan sobre la preparación y el estudio de nanopartículas de óxidos de hierro con estructura tipo espinela. El interés de su investigación radica, fundamentalmente, en el cambio que experimentan sus propiedades en muestras que se preparan con tamaño de partícula dentro de la escala nanométrica. Esta modificación de sus propiedades es consecuencia tanto de su alta relación superficie/volumen como de efectos de confinamiento cuántico. Estos óxidos, conocidos también como ferritas, responden a la composición MFe2O4 (siendo M2+ = Co, Ni, Zn u otros metales) y su estructura se puede describir como una estructura cúbica compacta de átomos de oxígeno en la que los iones M2+ y Fe3+ pueden ocupar huecos tetraédricos y octaédricos. Debido a sus propiedades ópticas, eléctricas, magnéticas y catalíticas, el óxido de hierro conocido como magnetita, de fórmula Fe3O4, junto con otros óxidos de hierro de estequiometria semejante, se encuentran entre los materiales inorgánicos que más interés suscitan con base a su elevado potencial de empleo en diferentes aplicaciones...
In the last decades, there has been a significant increase in the number of studies based on nanomaterials. Among the most studied topics are those related to the preparation and study of iron oxide nanoparticles with spinel structure. The interest of their research lies, fundamentally, in the change experienced by their properties in samples prepared with particle size within the nanometric scale. This modification of their properties is a consequence of both their high surface/volume ratio and quantum confinement effects.These oxides, also known as ferrites, respond to the composition MFe2O4 (being M2+ = Co, Ni, Zn or other metals) and their structure can be described as a compact cubic structure of oxygen atoms in which M2+ and Fe3+ ions that can occupy tetrahedral and octahedral sites. Due to its optical, electrical, magnetic and catalytic properties, the iron oxide known as magnetite, with the formula Fe3O4, together with other iron oxides of similar stoichiometry, are among the inorganic materials that arouse more interest based on their high potential for use in different applications...
In the last decades, there has been a significant increase in the number of studies based on nanomaterials. Among the most studied topics are those related to the preparation and study of iron oxide nanoparticles with spinel structure. The interest of their research lies, fundamentally, in the change experienced by their properties in samples prepared with particle size within the nanometric scale. This modification of their properties is a consequence of both their high surface/volume ratio and quantum confinement effects.These oxides, also known as ferrites, respond to the composition MFe2O4 (being M2+ = Co, Ni, Zn or other metals) and their structure can be described as a compact cubic structure of oxygen atoms in which M2+ and Fe3+ ions that can occupy tetrahedral and octahedral sites. Due to its optical, electrical, magnetic and catalytic properties, the iron oxide known as magnetite, with the formula Fe3O4, together with other iron oxides of similar stoichiometry, are among the inorganic materials that arouse more interest based on their high potential for use in different applications...
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Tesis inédita de la Universidad Complutense de Madrid, Facultad de Ciencias Químicas, Departamento de Química Inorgánica I, leída el 08/02/2021